freemarker报错之八

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1、错误描述

freemarker.core.ParseException: Encountered "string" at line 21, column 21 in type.ftl.Was expecting one of:    "}" ...    "." ...    "[" ...    "(" ...    "?" ...    "!" ...    <TERMINATING_EXCLAM> ...    "??" ...    "+" ...    "-" ...    "*" ...    "/" ...    "%" ...    "!=" ...    "=" ...    "==" ...    ">=" ...    <ESCAPED_GTE> ...    ">" ...    <ESCAPED_GT> ...    <LESS_THAN_EQUALS> ...    <LESS_THAN> ...    ".." ...    <AND> ...    <OR> ...    at freemarker.core.FMParser.generateParseException(FMParser.java:4702)at freemarker.core.FMParser.jj_consume_token(FMParser.java:4573)at freemarker.core.FMParser.StringOutput(FMParser.java:1070)at freemarker.core.FMParser.Content(FMParser.java:2580)at freemarker.core.FMParser.OptionalBlock(FMParser.java:2791)at freemarker.core.FMParser.Root(FMParser.java:2963)at freemarker.template.Template.<init>(Template.java:171)at freemarker.cache.TemplateCache.loadTemplate(TemplateCache.java:447)at freemarker.cache.TemplateCache.getTemplate(TemplateCache.java:360)at freemarker.cache.TemplateCache.getTemplate(TemplateCache.java:235)at freemarker.template.Configuration.getTemplate(Configuration.java:578)at freemarker.template.Configuration.getTemplate(Configuration.java:543)at com.you.freemarker.FreemarkerTemplate.getTemplate(FreemarkerTemplate.java:52)at com.you.freemarker.FreemarkerTemplate.printFtl(FreemarkerTemplate.java:76)at com.you.test.freemarker.FreemarkerTest.studentPrint(FreemarkerTest.java:172)at com.you.test.freemarker.FreemarkerTest.testDataType(FreemarkerTest.java:159)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)at org.junit.runners.ParentRunner.run(ParentRunner.java:300)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

2、错误原因

 ${(num.color)??string}

“？？”出现错误，不符合freemarker中的语法规定

3、解决办法

将“？？”修改成符合freemarker语法的“？？？”

${(num.color)???string}

结果：false

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